Debris flow characteristics investigation and trend prediction of Mocao Gully in Huidong Country, Sichuan Province, China
Year: 2025
Type: article
Abstract: In June 2017, heavy rainfall triggered a debris flow disaster in Mocao Gully, Huidong County, Liangshan Prefecture. This event resulted in casualties, with 10 to 29 people killed or missing, and over 30 seriously injured. The debris flow also caused blockage of steel culverts on the high-level overpass road spanning Mocao Gully and damaged facilities of the Lower Baimachuan sand and gravel processing system. To characterize this debris flow event in Mocao Gully, a geo-environmental dataset of the study area was developed by integrating regional geological, hydrogeological, and remote sensing monitoring data. Subsequently, the development and evolution of mudslide source areas and channels within the study area were comprehensively analyzed using remote sensing interpretation and field investigation techniques. Based on this analysis, the dynamic characteristics and development trend of debris flows were simulated using FLO-2D software. The simulation results indicate that Mocao Gully remains susceptible to large-scale debris flows under 50 to 100-year rainstorm conditions, potentially causing significant damage. This study provides a scientific basis for comprehensive debris flow prevention and control measures in Mocao Gully and serves as a reference for the prediction and assessment of debris flow events in similar environments.
Source: Natural Hazards Research
Authors: Bu Xianghang, Fan Songhai, Zhang Zongxi, Zhu Ke, Ma Xiaomin
Language: English
Subfield: Management, Monitoring, Policy and Law
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4411276599